Airsoft Springmeter AEG

SpringMeter is a tool for ASG service and fanatics. The tool makes it easier to "weigh" springs with a bathroom scale.
Treat SpringMeter more as a comparison tool than a tool for accurate spring measurement;)

For construction you need:
- old cylinder from AEG,
- old AEG piston
- M3 screws and nuts

How to use it?
You take a spring from the replica which gives for example 370FPS - youre target is 350FPS. You measure the first spring - let's say it gives a result of 8kg, then you choose